Yahweh Yahweh is one of the Hebrew names for He whom Christians call God. I was, I am, I will be what I will be. http://members.tripod.com/~davidmyriad/phoenician.alphabet.index.html
Yahweh himself was manifest as the wandering star Jupiter, the planet of kingship. http://cc.usu.edu/~fath6/bible.htm
Some claim that the name Yahweh inspired a Y as a Forked Cross seen on clerical vestments, such as the chasuble (a sort of poncho worn by Lutheran, Anglican and Catholic priests during mass). http://www.seiyaku.com/customs/crosses/forked.html
It is possible that this Y has a deeper origin and that it is linked with the Bifurcation in the Milky Way which forms a Y.